[Bridge] Bridging VLANs and PVST+

Geoff Wiener gwiener at aenigmacorp.com
Tue Nov 25 07:37:22 PST 2008


JP;

I've had this very issue.  I know that 2.6.24-16 allows PVST BPDUs to cross the bridge.  Linux won't speak Cisco PVST+ but it will pass the BPDU's so that Cisco devices on both sides can communicate about the link state.

That has been my experience anyway (long and painful I might add).

G

-----Original Message-----
From: bridge-bounces at lists.linux-foundation.org [mailto:bridge-bounces at lists.linux-foundation.org] On Behalf Of João Pedro
Sent: 25 November 2008 3:31 PM
To: bridge at lists.linux-foundation.org
Subject: [Bridge] Bridging VLANs and PVST+


Hello,

Two years ago there was a post regarding a patch to the Linux kernel  
allowing it to bridge of two VLANs with Cisco's PVST+  
(https://lists.linux-foundation.org/pipermail/bridge/2006-May/004921.html). I  
tried contacting both Gergely Madarasz (the author of the patch) and  
Ian Schwimmer (who started the thread) without any luck.

Does anyone has this patch? Or, for that matter, a solution on how to  
do this? I'm currently using ebtables on SLES10SP2 to DROP the  
switch's BPDUs, avoiding it from shutting down the port; I have also  
changed the bridge's ULA in order to use "per-vlan" STP. This  
situation if far from ideal, of course: it would be great to have STP  
working between the Linux box and the Cisco switch (or any other  
switch), allowing it [the Linux Box] to "fail-to-wire" if something  
was to go wrong.

Thank you,
JP
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